Arylalkylpiperazine compounds as antioxidants
CA 2253566 A1 · Owner: Robertson, Alan Duncan · Inventors: Collis, Maree Patricia; Robertson, Alan Duncan; Beart, Philip Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Arylalkylpiperazine compounds (1) wherein B is aryl or optionally substituted aryl; R1 is hydroxy; R2 and R3 are the same or different and are independently selected from hydrogen or C1-3 alkyl; m is 0 1 or 2; D is a linking chain of , atoms which may be optionally substituted and which contains from 1 to 8 atoms in the chain; E is a phenolic antioxidant group or a corresponding amino derivative thereof wherein the phenolic hydroxyl is replaced by amino are , disclosed. The compounds have both free radical scavenging activity and block excitatory amino acid activity. Some compounds of the present invention also display an affinity for voltage-sensitive sodium channels.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.